我能够以gtk标签格式保存序列化的文件，但是之后无法使用反序列化功能打开该文件
File "example.py", line 58, in open_file
text = buf.deserialize(buf, des_tag_format, buf.get_start_iter(),
des_content)
这是我为开放函数编写的代码
filename = "Untitled"
def open_file(self, widget):
open_dialog = Gtk.FileChooserDialog("Open an existing file", self, Gtk.FileChooserAction.OPEN,(Gtk.STOCK_CANCEL,Gtk.ResponseType.CANCEL,Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
open_response = open_dialog.run()
if open_response == Gtk.ResponseType.OK:
filename = open_dialog.get_filename()
buf = self.mytext.get_buffer()
des_tag_format = buf.register_deserialize_tagset()
des_content = GLib.file_get_contents(filename)
text = buf.deserialize(buf, des_tag_format, buf.get_start_iter(), des_content)
self.mytext.get_buffer().set_text(text)
open_dialog.destroy()
elif open_response == Gtk.ResponseType.CANCEL:
print("Cancel clicked")
open_dialog.destroy()
这是一个小型文本编辑器的完整代码，可以保存为序列化的gtk标签格式
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk, Pango, GLib
class MainWindow(Gtk.ApplicationWindow):
def __init__(self):
Gtk.Window.__init__(self, title = "TwoNote")
self.grid = Gtk.Grid()
self.toolbar = Gtk.Toolbar()
self.grid.add(self.toolbar)
#buttons for toolbar
self.button_bold = Gtk.ToggleToolButton()
self.button_italic = Gtk.ToggleToolButton()
self.button_underline = Gtk.ToggleToolButton()
self.button_save = Gtk.ToolButton()
self.button_open = Gtk.ToolButton()
self.mytext = TextSet(self.button_bold, self.button_italic, self.button_underline)
self.button_bold.set_icon_name("format-text-bold-symbolic")
self.toolbar.insert(self.button_bold, 0)
self.button_italic.set_icon_name("format-text-italic-symbolic")
self.toolbar.insert(self.button_italic, 1)
self.button_underline.set_icon_name("format-text-underline-symbolic")
self.toolbar.insert(self.button_underline, 2)
self.toolbar.insert(self.button_save, 3)
self.toolbar.insert(self.button_open, 4)
self.button_open.set_icon_name("document-open-data")
self.button_save.set_icon_name("document-save")
self.button_save.connect("clicked", self.save_file)
self.button_open.connect("clicked", self.open_file)
self.button_bold.connect("toggled", self.mytext.on_button_clicked, "Bold", self.button_italic, self.button_underline)
self.button_italic.connect("toggled", self.mytext.on_button_clicked, "Italic", self.button_bold, self.button_underline)
self.button_underline.connect("toggled", self.mytext.on_button_clicked, "Underline", self.button_bold, self.button_italic)
self.grid.attach_next_to(self.mytext, self.toolbar, Gtk.PositionType.BOTTOM, 10,30)
self.add(self.grid)
filename = "Untitled"
def open_file(self, widget):
open_dialog = Gtk.FileChooserDialog("Open an existing file", self, Gtk.FileChooserAction.OPEN,(Gtk.STOCK_CANCEL,Gtk.ResponseType.CANCEL,Gtk.STOCK_OPEN, Gtk.ResponseType.OK))
open_response = open_dialog.run()
if open_response == Gtk.ResponseType.OK:
filename = open_dialog.get_filename()
buf = self.mytext.get_buffer()
des_tag_format = buf.register_deserialize_tagset()
des_content = GLib.file_get_contents(filename)
text = buf.deserialize(buf, des_tag_format, buf.get_start_iter(), content)
self.mytext.get_buffer().set_text(text)
open_dialog.destroy()
elif open_response == Gtk.ResponseType.CANCEL:
print("Cancel clicked")
open_dialog.destroy()
def save_file(self, widget):
savechooser = Gtk.FileChooserDialog('Save File', self, Gtk.FileChooserAction.SAVE, (Gtk.STOCK_CANCEL, Gtk.ResponseType.CANCEL, Gtk.STOCK_SAVE, Gtk.ResponseType.OK))
allfilter = Gtk.FileFilter()
allfilter.set_name('All files')
allfilter.add_pattern('*')
savechooser.add_filter(allfilter)
txtFilter = Gtk.FileFilter()
txtFilter.set_name('Text file')
txtFilter.add_pattern('*.txt')
savechooser.add_filter(txtFilter)
response = savechooser.run()
if response == Gtk.ResponseType.OK:
filename = savechooser.get_filename()
print(filename, 'selected.')
buf = self.mytext.get_buffer()
start, end = buf.get_bounds()
tag_format = buf.register_serialize_tagset()
content = buf.serialize(buf, tag_format, start, end)
try:
GLib.file_set_contents(filename, content)
except SomeError as e:
print('Could not save %s: %s' % (filename, err))
savechooser.destroy()
elif response == Gtk.ResponseType.CANCEL:
print('Closed, file not saved.')
savechooser.destroy()
class TextSet(Gtk.TextView):
def __init__(self, buttonBold, buttonItalic, buttonUnderline, interval = 1 ):
# Textview Setup
Gtk.TextView.__init__(self)
self.set_vexpand(True)
self.set_indent(10)
self.set_top_margin(90)
self.set_left_margin(20)
self.set_right_margin(20)
self.set_wrap_mode(Gtk.WrapMode.CHAR)
self.tb = TextBuffer()
self.set_buffer(self.tb)
# Thread setup
self.button_bold = buttonBold
self.button_italic = buttonItalic
self.button_underline = buttonUnderline
def on_button_clicked(self, widget, tagname, widget1, widget2):
state = widget.get_active()
name = widget.get_icon_name()
bounds = self.tb.get_selection_bounds()
self.tagname = tagname
if(state):
widget1.set_active(False)
widget2.set_active(False)
#highlighting
if(len(bounds) != 0):
start, end = bounds
myIter = self.tb.get_iter_at_mark(self.tb.get_insert())
myTags = myIter.get_tags()
if(myTags == [] and state == True):
self.tb.apply_tag_by_name(tagname, start, end)
elif(myTags != [] and state == True):
self.tb.remove_all_tags(start, end)
self.tb.apply_tag_by_name(tagname, start, end)
else:
for i in range(len(myTags)):
if(myTags[i].props.name == tagname):
self.tb.remove_tag_by_name(tagname,start,end)
myTags = []
self.tb.markup(widget, tagname)
def mouse_clicked(self, window, event):
self.button_bold.set_active(False)
self.button_italic.set_active(False)
self.button_underline.set_active(False)
class TextBuffer(Gtk.TextBuffer):
def __init__(self):
Gtk.TextBuffer.__init__(self)
self.connect_after('insert-text', self.text_inserted)
# A list to hold our active tags
self.taglist_on = []
# Our Bold tag.
self.tag_bold = self.create_tag("Bold", weight=Pango.Weight.BOLD)
self.tag_none = self.create_tag("None", weight=Pango.Weight.NORMAL)
self.tag_italic = self.create_tag("Italic", style=Pango.Style.ITALIC)
self.tag_underline = self.create_tag("Underline", underline=Pango.Underline.SINGLE)
def get_iter_position(self):
return self.get_iter_at_mark(self.get_insert())
def markup(self, widget, tagname):
self.tag_name = tagname
self.check = True
''' add "bold" to our active tags list '''
if(widget.get_active() == True):
if(self.tag_name == 'Bold'):
if 'Bold' in self.taglist_on:
del self.taglist_on[self.taglist_on.index('Bold')]
else:
self.taglist_on.append('Bold')
if(self.tag_name == 'Italic'):
if 'Italic' in self.taglist_on:
del self.taglist_on[self.taglist_on.index('Italic')]
else:
self.taglist_on.append('Italic')
if(self.tag_name == 'Underline'):
if 'Underline' in self.taglist_on:
del self.taglist_on[self.taglist_on.index('Underline')]
else:
self.taglist_on.append('Underline')
else:
self.check = False
def text_inserted(self, buffer, iter, text, length):
# A text was inserted in the buffer. If there are ny tags in self.tags_on, apply them
#if self.taglist_None or self.taglist_Italic or self.taglist_Underline or self.taglist_Bold:
if self.taglist_on:
# This sets the iter back N characters
iter.backward_chars(length)
# And this applies tag from iter to end of buffer
if(self.check == True):
if(self.tag_name == 'Italic'):
self.apply_tag_by_name('Italic', self.get_iter_position(), iter)
if(self.tag_name == 'Bold'):
self.apply_tag_by_name('Bold', self.get_iter_position(), iter)
if(self.tag_name == 'Underline'):
self.apply_tag_by_name('Underline', self.get_iter_position(), iter)
else:
self.remove_all_tags(self.get_iter_position(), iter)
win = MainWindow()
win.connect("delete-event", Gtk.main_quit)
win.show_all()
Gtk.main()
答案 0 :(得分：0)
您的deserialize调用失败的原因是，GLib.file_get_contents返回一个元组(result, contents)。
正确的代码应为：
result, des_content = GLib.file_get_contents(filename)
assert result
text = buf.deserialize(buf, des_tag_format, buf.get_start_iter(), des_content)